32T/34T/36T 8/9/10/11 Speed Chain Ring Wheel with 104BCD Crankset and Hollow Screw Threaded Bottom Bracket BB Made of high quality aluminum alloy material high strength, rustproof, solid but ultra-light. BCD: 104mm; Crank Arm Length: 170mm; BB: 99.7x24mm Hollow bottom bracket sprocket wheel shaft for single chain mountain bikes, road, folding bikes. Comes with 32T/34T/36T 8-11 speed chainring chainwheel. Specification: Material: Aluminum Alloy BCD: 104mm Crank Arm Length: 170mm Axis Diameter: 24mm Bottom Bracket: 99.7x24mm Package Includes: 1 Set Bike Crankset with Chainring Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-3mm differences due to manual measurement.